stare



E. T. STARR.

DENTAL PLIERS.

(No Model.)

No. 340,896. Patented Apr. 27, 1886'.

INVENTOR WITNESSES:

UNITED STATES PATENT OFFICE.

ELI T. STARR, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE S. S.XVI-UTE DENTAL MANUFACTURING COMPANY, OF SAME PLACE.

DENTAL GBPEIQEFIGATEQN forming part of Letters Patent No. 340,896; datedApril 27,1886.

Application filed January 5,1886.

To all whom it may concern.-

Be it known that I, ELI T. STARR, of the city and county ofPhiladelphia, in the State of Pennsylvania, have invented certain newand useful Improvements in Dental Pliers, of which the following is aspecification.

My invention relates to pliers more especially for dentists use.

'The object of my invention is more especially to provide improvedpliers for shaping and manipulating the gold or other thin metal bandsfor use as parts of the structure of art-ificial tooth-crowns.

In replacing lost or destroyed natural toothcrowns with artificialcrowns, so that the natural root is employed as the foundation or baseof the structure, metal bands are sometimes employed to encircle theneck or end of the natural root and the adjacent end of the artificialcrown. My pliers are especially designed to aid in shaping this metalband and in forming projections thereon to limit the extent of movementof the band upon the end of the root in fitting the artificial crown, orin making the attaclnnent thereto of the arti ficial denture.

My invention consists, mainly, of a pair of pliers one of thepivotedjaws of which has a depressed or cup-shaped recess and the otherjaw of which has an opposing knob or projection to fit or enter saidrecess in the opposite jaw, in combination with an adjustablepunch-plate fitted to convert said pliers from a shaping or contouringimplement into a punching implement, to further aid in forming metalbands for use in artificial dentures.

My invention further consists in providing one of said jaws with apivoted or adjustable plate, whereby the cup of the jaw may be closedand a punch or die brought into action to further aid in shaping ormauhpulating the metal band or ring.

The subject-matter claimed herein by me is particularly recited at theclose of this specification. My present invention relates to the pliers,and does not, of course, include the metal band for the artificialdenture when shaped thereby, such a band and denture being claimed by mein another application for Letters Patent.

Serial No. 187,719. (No model.)

In the accompanying drawings, Figure 1 is a view in elevation of myimproved pliers, showing the punch-plate in position for operation. Fig.2 is a face view of the jaw having the rounded or equivalent shapeprojection thereon. Fig. 3 is aview in elevation showing the punch-plateas out of the way and the cup and correspondingly-shaped projection onthe opposite jaw as ready for operation. Fig. 4. is a view of the faceof the jaw carrying the punch-plate, and showing said punch-plate inposition for operation; and Fig. 5 is a longitudinal section through thepliers with the parts in the position last described. Fig. 6 is a viewof the face of the punch-plate jaw with the punchplate turned to oneside so as to be out of the way, and Fig. 7 is a section through thepliers with the punch-plate in the position last described. Figs. 8, 9,and 10 are views of the plain-metal band to be operated upon, thecontoured or bent band, and asectional view of the punchedup contouredband in its completed condi tion, respectively.

After the plain band A, Fig. 8, has been fitted to the end of the rootits sides are to be curved, contoured, or concavo-convexed, as shown inFigs. 9 and 10, and it is to do this that my improved instrument wasmore especially devised. The metal band is first bent, contoured, orcurved by means of the cup or depression I) in the jaw B and acorrespondingly-curved knob or projection, c, on the end of the jaw C.Said jaws arepivotedtogether, as usual, at i, and are extended to formthe handles 13 C, respectively. By compressing said handles so as tobring the jaws together upon the band properly placed between theoperating ends of the jaws, said band will be contoured or curved, asshown in Figs. 9 and 10, and after it has been properly curved allaround its periphery it is ready to be punched up, or have the teats a,which project inwardly, formed thereon. This is then accomplished bymoving a spring-plate, D,whicl1 is pivoted at one end at (1, around soas to cause its rounded end (1 to snap or spring into the cup I) ofthejaw B, and thereby be held firmly in that position. The punch-plate Dmay not be a spring'plate, and may be limited in its IGO movement whenturned or moved to its operating position by any suitable means; but Iprefer that said plate be a pivoted springplate and operate, as abovedescribed. The face of the spring-plate D carries a punch or projection,(2 which is adapted to enter a socket or recess, a in the knob orprojection c of the jaw O. Said recess 0 is somewhat larger than thepunch (P, so that when the band is inserted between the j aws and thejaws close, a teat or projection will be punched up on the band,projecting inwardly, while the metal of said band will not be perforatedor punched completely out, as is obvious. The use of the aforesaid teats01' projections a is to limit the extent of movement of the band uponthe tooth-root in fitting the parts together.

I claim as my invention 1. An improved dental instrument, consist- Intestimony whereof I have hereunto subscribed my name.

ELI T. STARR. Witnesses:

ALBERT P, Roo'r, \V. R. POTTER.

